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Date: Tue, 26 Jan 2010 12:10:51 +0900
From: Tejun Heo <tj@kernel.org>
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To: Al Viro <viro@ZenIV.linux.org.uk>
CC: "H. Peter Anvin" <hpa@zytor.com>, Frederic Weisbecker <fweisbec@gmail.com>,
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Subject: Re: [PATCH 7/8] percpu: add __percpu sparse annotations to	hw_breakpoint
References: <1264432935-10453-1-git-send-email-tj@kernel.org> <1264432935-10453-8-git-send-email-tj@kernel.org> <20100126001901.GI5087@nowhere> <4B5E3F2C.2010702@zytor.com> <4B5E4E12.7060900@kernel.org> <20100126020452.GB19799@ZenIV.linux.org.uk> <4B5E508A.1030305@kernel.org> <20100126023238.GC19799@ZenIV.linux.org.uk> <4B5E56EC.2090600@kernel.org> <20100126024857.GD19799@ZenIV.linux.org.uk>
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Hello,

On 01/26/2010 11:48 AM, Al Viro wrote:
> On Tue, Jan 26, 2010 at 11:43:56AM +0900, Tejun Heo wrote:
> 
>>> Eh...  You are leaving that noderef in place in case of array.  And _that_
>>> is not an address space, so casts to AS 0 won't do you any good.
>>
>> Any ideas on how to fix it?
> 
> BTW, before we go any further, which warnings are you getting from sparse
> and which version of sparse are you using?
> 
> noderef is one thing; address_space mess is a different story.  The version
> I have here steps into the former, but not the latter; what are you seeing?

Oops, I too am seeing the noderef thing not the address space warning.

 char *estacks = per_cpu(exception_stacks, cpu);

I get

arch/x86/kernel/cpu/common.c:1149:19: warning: incorrect type in initializer (different modifiers)
arch/x86/kernel/cpu/common.c:1149:19:    expected char *estacks
arch/x86/kernel/cpu/common.c:1149:19:    got char [noderef] *<noident>
  CC      arch/x86/kernel/cpu/common.o

$ rpm -qi sparse
Name        : sparse                       Relocations: (not relocatable)
Version     : 0.4.1.git1                        Vendor: openSUSE
Release     : 3.2                           Build Date: Sat 24 Oct 2009 11:58:16 AM KST

Thanks.

-- 
tejun
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